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Direct Dial Calls:
Some coast stations provide automatic connection from the public switched telephone
network allowing a telephone subscriber to call the ship directly without operator intervention
at the coast station.
Note: Auto Acknowledgement must be On to allow automatic connection, see DSC Status
Display.
An acknowledgement is initiated immediately when a Direct Dial call is received. The
handset should be lifted off hook within 1 minute which will initiate a DSC call on the working
frequency. This call is used by the coast station for channel quality evaluation. When
acknowledgement is received telephone conversation can start.
When the handset is placed on hook after a Direct Dial call a DSC call indicating 'End of call'
is send to terminate the connection. The coast station may respond with a DSC Call
indicating the chargeable duration of the connection.
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